Overseas movie box office is needed to provide profitably to almost all movies in 2018.
Other than Black Panther, Fifty Shades Free and a Wrinkle in Time there are no other movies that would be profitable with only their domestic box office. Most movies have a budget of $50 million or more.
In North America it is only the big superhero movies and Star Wars movies and some cheap horror movies that are really profitable.
NetFlix and Youtube are taking away the rest of the entertainment dollars and attention. Netflix and Youtube and have hit upon a sweet spot of good enough entertainment.

Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
Known for identifying cutting edge technologies, he is currently a Co-Founder of a startup and fundraiser for high potential early-stage companies. He is the Head of Research for Allocations for deep technology investments and an Angel Investor at Space Angels.
A frequent speaker at corporations, he has been a TEDx speaker, a Singularity University speaker and guest at numerous interviews for radio and podcasts. He is open to public speaking and advising engagements.